Range
| Product Form | Imperial Sizes | Metric Sizes |
|---|---|---|
| Round Bar Peeled K12 | 4" | 100mm |
If you do not see what you are looking for, please contact your local service centre with your specific requirements.
Related Specifications
Grade 1.4462/2205 is similar to but may not be a direct equivalent:
- UNS S31803
- UNS S32205
- BS 318S13
Properties
Chemical Composition
1.4462 Steel
EN 10088-3
| Chemical Element | % Present |
|---|---|
Carbon (C) | 0.00 - 0.03 |
Chromium (Cr) | 21.00 - 23.00 |
Manganese (Mn) | 0.00 - 2.00 |
Silicon (Si) | 0.00 - 1.00 |
Phosphorous (P) | 0.00 - 0.03 |
Sulphur (S) | 0.00 - 0.02 |
Nickel (Ni) | 4.50 - 6.50 |
Nitrogen (N) | 0.10 - 0.22 |
Molybdenum (Mo) | 2.50 - 3.50 |
Iron (Fe) | Balance |
Mechanical Properties
Bar Up to 160mm Dia/Thickness
EN 10088-3
| Mechanical Property | Value |
|---|---|
Proof Stress | 450 Min MPa |
Tensile Strength | 650 to 880 MPa |
Elongation A50 mm | 25 Min % |
Hardness Brinell | 270 Max HB |
General Physical Properties
| Physical Property | Value |
|---|---|
Density | 7.805 g/cm³ |
Thermal Expansion | 13.7 x10-6/K |
Modulus of Elasticity | 200 GPa |
Thermal Conductivity | 19.0 W/m.K |
Electrical Resistivity | 0.85 x10-6 Ω .m |
Applications
- Process industry components in sulphuric acid, nitric acid, phosphoric acid, ethylene oxide, polypropylene & PVC production
- Equipment handling organic & fatty acids, chemical storage, tankers, heat exchangers
- Marine industry and shipbuilding propellers, shafts, rudders, shaft seals, pumps, bolts, fasteners, valves, instrumentation
- Oil and chemical tankers
- Oil & Gas industry pumps, valves, pipe, vessels, wellhead equipment, subsea equipment, separators, heat exchangers
- Pollution control systems, effluent scrubbing, flue gas desulphurisation (FGD)
- Waste water treatment, sour water purification
- Pulp & paper industry applications such as pulp liquor heaters, bleach tower linings, digesters, brownstock washers
- Food industry applications including brewery piping, evaporators, hot liquor tanks, presses
Characteristics
- Higher strength than standard stainless steels
- Higher corrosion resistance than Alloy 316L stainless steel in a wide variety of corrosive chemicals including sulphuric, phosphoric and nitric acids
- Good resistance to pitting and crevice corrosion in seawater
- High stress corrosion resistance
- Lower thermal expansion than austenitic stainless steels
- Higher thermal conductivity than austenitic stainless steels
Additional Information
Fabrication
Fabrication of all stainless steels should be done only with tools dedicated to stainless steel materials. Tooling and work surfaces must be thoroughly cleaned before use. These precautions are necessary to avoid cross contamination of stainless steel by easily corroded metals that may discolour the surface of the fabricated product.
Weldability
Duplex stainless steels have good weldability. All standard welding processes can be used. They are not quite as easily welded as the austenitic grades but low thermal expansion in duplex grades reduces distortion and residual stresses after welding. The recommended filler material for 2205 stainless steel is 2209.
Corrosion Resistance
Duplex stainless steels are extremely corrosion resistant. They have high resistance to intergranular corrosion. Even in chloride and sulphide environments, duplex stainless steels exhibit very high resistance to stress corrosion cracking.
The super duplex grades are even more resistant to corrosion.
Machinability
Although machinable, the high strengths of duplex stainless steels makes machining difficult. As an example, machining of 2205 is around 20% slower than for 304.
Machining can be enhanced by using the following rules:
- Cutting edges must be kept sharp. Dull edges cause excess work hardening.
- Cuts should be light but deep enough to prevent work hardening by riding on the surface of the material.
- Chip breakers should be employed to assist in ensuring swarf remains clear of the work
- Low thermal conductivity of austenitic alloys results in heat concentrating at the cutting edges. This means coolants and lubricants are necessary and must be used in large quantities.
Heat Treatment
Duplex stainless steels cannot be hardened by heat treatment. They can however be work hardened.
Solution treatment or annealing can be done by rapid cooling after heating to around 1100°C.
Heat Resistance
The high chromium content of duplex stainless steels that protects against corrosion, causes embrittlement at temperatures over about 300°C.
At low temperatures duplex stainless steels have better ductility than the ferritic and martensitic grades. Duplex grades can readily be used down to at least -50°C.
